Determine Whether the Given Argument Is Valid or Invalid $\lor$

Essay

determine whether the given argument is valid or invalid. If it is valid, provide a derivation of the conclusion from the premises. If it is invalid, provide a counterexample.
-1. G ⊃ (H $\lor$ I)
2. G ≡ (∼I ⊃ H) / ∼H ⊃ ∼G